joplin-notes/joplin notion extension/linux/tmux.md

tmux https://www.youtube.com/watch?v=U41BTVZLKB0 https://tmuxcheatsheet.com/

• Start a new window with tmux command
• At the bottom-left of screen there is [0] 0:bash* [0] : session name 0 from 0:bash : index bash : windows name * : current window
• to start a session with custom name use tmux new -s backups or tmux new-session -s backups. to rename current session use c-b $. to close the particular session use tmux kill-ses -t session_name. To close current session go to command mode by c-b : then type kill-session and hit enter.
• to create a new window use c-b c means press Ctrl+B then release them and instantly press c. to go to next window press c-b n and to previous window c-b p. to specfic window index press c-b INDEX(eg: c-b 1 to go to 2nd window as 2nd window index is 1). to kill current window use c-b &.
• when we start a process say htop that window name will be changed to htop. but in order to change window to custom name press c-b , then type type name and enter
• Attach/dettach mode: If we start a service like nodejs code by npm start or any other and donr want terminal to be open and just run in background we need to detach it by c-b d. this will detach whole session. To reattach to recent session use tmux a or tmux at, tmux attach, tmux attach-session. To reattach to particular session use tmux a -t backups -t means target
• to list tmux sessions use tmux ls or tmux list-sessions
• Switching : when in tmux, to switch between sessions use c-b s which will presents a tui screen to choose session from and for windows switching use c-b w.
• To get list of keyboard shotcuts use c-b ?
• Splitting panes : To switch panes horizontally use c-b % and for vertically use c-b ". To go to last active pane press c-b ; and for navigating use c-b arrow-keys for respective direction. To close current pane use c-b x.
• to scroll press c-b [ then use arrowkeys/pgup/pgdown keys to scroll
• Icons : start tmux with tmux -u to enable unicode support.  

automatic adding and running commands in tmux

#!/bin/bash

SESSION="my_session"

tmux  new-session -d -s  $SESSION

#C-m emulates pressing enter key
tmux send-keys -t $SESSION:0 "htop" C-m

#create a new window of index 1 with name 'logs'
tmux new-window -t $SESSION:1 -n "logs"
tmux send-keys -t $SESSION:1 "history" C-m

tmux new-window -t $SESSION:2 -n "monitor"
tmux send-keys -t $SESSION:2 "while true; do echo 'Monitoring...'; sleep 5; done" C-m

tmux attach-session -t $SESSION```